Most do have copper in the wiring.
yes
My PC speaker cables have a copper wire, as well as a insulated (white) copper wire. The headphones (Sony) appear to have 3 wires in them - green, red, and orange. The links you posted are more for car/home theater speaker wire.
The Markiplier's headphones are headphones that are designed and branded by Markiplier.
Supra-aural headphones are headphones that sit directly on the ears instead of enveloping them, which is what circumaural headphones do.
headphones are cool
According to the "Don't Hike with Headphones" blog, it is not safe to hike with headphones.
Thye are headphones
Headphones.
Shure Headphones are ranked the number one headphones.
to put headphones on your ears is to put the left side of headphones is put headphones away from your ears
round about 1910 headphones where invented
It should come with headphones